ISO 20022 Bank Transaction Code from <BkTxCd>.
Uses the three-level External Code List hierarchy:
domain— e.g."PMNT"(Payments)family— e.g."RCDT"(Received Credit Transfer),"ICDT"(Issued Credit Transfer)sub_family— e.g."XBCT"(Cross-Border Credit Transfer)
A proprietary code may be present instead of or alongside the ISO code.